RE: OS Max FS 62V Four Stroke
Having to open the high-speed needle so far tells me that you're just not getting fuel pressure. You may not have enough pressure going to the engine from the muffler, your fuel line may be too small, or there may be some obstruction in the fuel system.
Generally, you set up a carb so that the idle mixture is very rich, get the engine running and find the high-speed needle setting. This may take time until the engine is broken-in enough to allow leaning to peak RPM. Then, you can retard the throttle and adjust the idle RPM and idle mixture.
All that being said, if your engine demands that the needles be open more than expected, but it's still running well and not too lean, then the settings are correct. Basically, if it's working right, you're OK.